Improving the performance of 2D perovskite solar cells by carrier trappings and minifying the grain boundaries

Fabrication of 2D perovskite layers on 3D light absorbers, as the solar cells (PSCs), is being exploited to achieve a high power-conversion efficiency (PCE) along with promising long-term stability. However, improve performance PSCs, an intermediate layer smart material required which can facilitate desired interaction between two layers. The present work explores role 4-methoxyphenethylammonium (MPA+) cations interfacing in halide towards developing efficient PSCs. effect different ammonium salts (NH4Cl and NH4SCN) additives mixed MPA0.2MA0.8PbI3 examined optoelectronic photovoltaic responses developed PSCs are investigated detail. Mixed thin film processed NH4SCN additive showed improved morphological crystalline properties fabricated well reduced non-radiative charge-carrier recombination rate. NH4SCN/MPA0.2MA0.8PbI3 based PSC demonstrated highest PCE ~15.1%, nearly 10% higher compared that control sample (~13.7%) NH4Cl/MPA0.2MA0.8PbI3 (~7.53%). efficiency, additionally significantly device It retained value ~95% its initial even after exposure ambient condition upto 300 h. presented stability could open new avenues for improving increase their contribution generation renewable energy future.